Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58a2e0611521ddb5705fef83e7a755d8564fa223883aaf969f831f0b32b60305' 
  AND token = 'DnScLAJw9dLEsJMzeEM0Qcenkq5bie9YtPaXYEMm7EQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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