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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35bc8803107776253c5aaf4c7b645f0bfc9744d41ac705c9424c2d0be2fc40fa' 
  AND token = '4c7ZTYnzeaQTyiftIB3p+yzdZ4XBWVbUzN8IGL5YXGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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