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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'dadde115884d68f03ce31131765b83ec8b795c7174a7a0ad0f03ca8683d8b97e' 
  AND token = 'JLRmXpg+R8z9ktxdfSLBz0dbdYwLYfzafQ780iiRyv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}