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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1de083a917c6bcb8022fb9ed6f1e1d998cd41f4ff9829fd822a0adf8afd9767c' 
  AND token = 'Xgh0YmprfqFMihiB4cx8rxD8zjST/qjteeBm9YT8lJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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