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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5775875deae43119bad4f2eba31332a590c3fb3595c151ccc6d799b0f963a865' 
  AND token = 'WrBbgAaSScqHT1pBM4rEKl+sAKYVu1dkIwk2yHlX0Vs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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