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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '381756d967e0265da04d871b4c39adec4629192d454515aca728a751bbf4f00e' 
  AND token = 'L1k0+GpRU7llXfZFc3I56SBNMAzqL3YEa5MepcA/Bik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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