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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ec1e48152475b9015d7646a2544e5d6eb08e2f03f1bdcf2db4e1628398518d6' 
  AND token = 'G8nCfmyjc0t09eG7LrEvqQA2qH4X/GSP8KZJ18J1m7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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