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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5487aaeebb8cde20fc1358ef860f8f57fdcd6e9b5a401044bbc3f099d9b9f1b' 
  AND token = 'UTv+B9iT5A2eAxOm8fgbG22oTSuqsEhboyo88BvmuVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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