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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd37057e820e8272027f09bd8a23b13fe73cb09d18eed66064c9ea9041cf5153' 
  AND token = 'OutiNSQRzNvRnA/i2v7L7G7xXkn476XP8v0Cw2lLMoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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