SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcd3bbecb5df904b96325d5179767f47d3a5e602ea9c3c52ba6275bd96c38158' 
  AND token = 'oPO86Af2CvmMPwwIM4hdQ2VV0YqLHSHzzu5Gf3QAKlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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