Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b933b9150e6f90e78ef00ee8e224e97e8bbf045fe75982821be17a88f0cfdc0c' 
  AND token = 'wZneLpjy+1y0Cu2LN2zsXmx1/FFbS2CdxE8SpDM6PVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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