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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '344eb6d58b3ba2907d1d926006a263c259d359a0fb578152a2a0dac7219d1bb7' 
  AND token = 'js8qOq2NpbQMtm0EKDfPohArGSPO+aLy0WQcCRua7M4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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