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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '47acb88dd3784b53e35bf2401fdc5562ebfb1a9e714e343d0a7945ccb5b09701' 
  AND token = 'fX4YJW131Kzgc3D+7VU4jHyR5D/Ex71eanUaOyHAk9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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