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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19d38cdda7b3db6a9736f17ea1f8a5c7964b3e1af13747ad8e7d68296f2cc476' 
  AND token = 'shQ/dOtAoLM/llVJ7m4Soj9vdeWQa4Mz7JQDWFZ1D3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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