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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00c9ed9cc87a92a98f15c133b2a933fa9b5926be5ebfeacb28801e45594d2e11' 
  AND token = 'f6hNVm73sZ2cP8r9R5kRT4KuGsOlKh8MCM17obrGxdw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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