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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee770608bff1f4c0b9dff62a40b0b98db7312ffa15d2efbb4b84b42fb73132c8' 
  AND token = '69q43xbEM2mc0Sh8tcW9krBi7uxil0Hp67J7wCOhYLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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