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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cea6073d2bec799068612f8409bac8f6ec131ceaaeaa4bb555db5461083ddc37' 
  AND token = 'cX8SNZUNSorr1/q3DMXueVfPhsR8+7+ftJu9LtEUPFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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