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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e34bd08bfb214b59154ac9e2cab2ffd90d9d10be1781da54c416c78be71017f' 
  AND token = '7PqbHI5oXaqYEg0iuSYYVadHKd5VHfOgI+aV44Yhifw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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