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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebd90ba21868186b99fb7f0c5c1d47c8498a087a009ff72f1a9aa0d79c5a04b0' 
  AND token = 'soZB5OTtlVPxJfTs1eVuXusdmPFKPaF7Yf0yR3QofI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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