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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd2b96e7976738f833e0ec4946a2915256d0d9f207b229b249e98cd3b96901b9f' 
  AND token = 'gQ9Z9xEXWCjXUExYaEYDGDuUslCV08PekgIuzIeFDe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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