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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2c1eef260713cbab67f716b1a48344df58d806f7a66ceec8e3ecc3136af36a4' 
  AND token = 'JFsa4wBbviRaUyAvlkRTNbIgDlDxL3VEY7Xw/ol2cpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00077

JSON explain

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