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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01426ef427c58665ad9d8ea802a5ba805396cd3340aad7329b94d55660a102e4' 
  AND token = 'qrF3ySqiaeW5OgqcnqTVv7docIlsGTqd0wE6N6h0DDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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