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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02e8e0faf90f2c277e8cde040d8653b80947b6007888fc302076f50e1edb797b' 
  AND token = '8U6kH/9fsx4smsR5Ny4gEPyQOOL0KUnFh1CPGNs5Fhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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