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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc308bd0e63cee0c5a5b37ccb9a7191a7cdefc813c27aa2507d4c47ead2fd645' 
  AND token = 'O5eu+J65K59gnU1FnGPQ9CEbKjgpJ1jRd9MXaQyJiys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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