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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7058a906b88df74e6ceaed47c003f35c6774c55183b42490b00654e9a267131' 
  AND token = 'nbu/0qcqGFleGwj+CzW4vNxjg5L5x55u3q0Ha8YNCLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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