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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca06bc9a04e1fa9b447d1f4ec5065dcd530e590734fa7e504d1504d96fa8c9d7' 
  AND token = 'Tc2PSWX1NbHW52My1r99mZFChPIBOdCnvvsRJqi5i9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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