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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbcee17277d99d86ad2c064019b70e0cd27359bb67ac93ca38f03886a113b0af' 
  AND token = 'Slu4zhXqNq3g59c6gOyYt6BXJJDTNqc7ky3TxG+cOtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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