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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ef0baa3ca483e2c5aad4ba2f1d53b4d08e70fd67a1e6105c30668c36335dc8d0' 
  AND token = 'VIhl4rF7PMRpG61yJ1y+7CFIOPbIjdU0MOmoANozlU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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