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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c223bf054961f58545319e3c9f9c5808b56efe7140085312f2c4c8f3f29fdb25' 
  AND token = '1v0znndgwISP75Qjpft41qgPiLEIp/Wv8tonmsfReao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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