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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aae368a030a83f2de9b1a6dfcd800330200c0f95f7154a61f2b2c0ea415e2dda' 
  AND token = '+J0nIOH0/seaz0yja7zhTRTFjIjqXE3ml+K+vzNPe+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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