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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6b5da0f6e586ba92c893486aad015c7a1b7d614fe784f20509ac66c7fedec6b3' 
  AND token = 'AyUoEXtR25g/kSm84jnM/YQ0k8jNVn6CfAnFMQFRljY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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