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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a94a7e82e17144dc40c7b553a072918ab9cda24aabd6a1eb0a612eb43aae614' 
  AND token = 'E95SPjwk6vcUeT2ETkXnIzqrWnng102zNQuDXAnDKVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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