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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88b06b5bb7809baf494d12bb5661ad6bdc8262688704578ab7088fcd51f73d77' 
  AND token = 'e7yJ2r/iO+/6TQ0s3+QtxZFJbiM/y2FMWZJt9p9+tMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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