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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4720c8a016f84cdcdf4065358a4682267045790efdd5428762cb4d74f4b83765' 
  AND token = 's49zzxYH0inEfjgIvikHIbkFF5myW/Mt7W3p0JuUO9s=' 
  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"
    }
  }
}