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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0df9c49b5c2375c68e1a1db0568ebd15b8bb8932b21f3c670df3f0d062337eda' 
  AND token = 'f7Lujq9Xr+AgrHH5eiCUSIk7DCsjZ9ixMu6P+ONbDsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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