SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e52ac4cb173213f4013428b7162469ccfc288fc3f2a52848263b5c8b9363a9b6' 
  AND token = 'bdBGzPJZqct5hv2H0LKnJda7Uf4Ms80cSuXCIwmm3+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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