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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01dd223b99b63c7886883041084188d857f415b50c957059d0704d75cf9bde90' 
  AND token = 'zKDJBkHcvd3/ioOFRmy17ytHMPEtbJxXW9i6JBj1LF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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