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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32d40a26666d4c081cdd3a9d293e21363e8d76ea55bf667cb54a5e57e76484bf' 
  AND token = 'wUAOEMjtU7eNe2OGhq+/K4+s+f9lhDhsdJqGtiIEvaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}