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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '157a305d7110eaded859662c68ed86a0a7ba1d3f9d29bf88881fe78457a382fe' 
  AND token = 'QRnSH3yVbJPMIaKFC0emIFy7zhPDaL5oqpZFlxYAN1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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