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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0574f8259dd758db78f8ebdd6e5443ff43cd1a10d20c3d089c9b6fda5c82ef56' 
  AND token = '6f9D5AbxYSsATYNe8+SCebGOdid9x4MZ+Je/K6miwHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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