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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '18b291bc86a3c9c5ab0e912967460ca56c13859e5bdcb8780c3010fda5db3fee' 
  AND token = 'DPdIN3cjTaSmFLtrPLRVvxuQzF6kt7jeh2RbtIcWKe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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