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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65fbd9dbf38d210614b02f2ee6e04f6e181fcf18017ff4153be0b69d8d2d076f' 
  AND token = 'mRMrfDPGnh5X+nnrCvthq+83BTPi5ih1erMycDF4A9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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