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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06d022ead9954be4732db30911f7d758cf2bf8ed8e241ad4e3a37ddd0d2bd93f' 
  AND token = 'ZPyX4tghJpGEgVcbPy/OZI+Ni6ytBuQEP3TP6mdRjWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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