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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e32742bb13a5fb854b09c0949fbc7c83c8ba7dc44a896eb97c04e1bf7d9064b7' 
  AND token = 'vf3PS21C9uILIFGWpJfTSyAyAletIxoaknrQWD0HNFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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