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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8f8450f089ab0baba6fbe41724e620801d1a84f78a5c0b6b2cd794f50e708d1' 
  AND token = 'ViazMquc0YDMUmz2J6vw7bGubQKJt0jpZcPD01jg0As=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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