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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff8ef3b7f471aa5d85976de8e67b6fff0b874296592812486d94cc0fbcc05fa7' 
  AND token = 'US1qfvt4ICLPxRiWEixQ45cNH0L+9xSv575RwjAepxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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