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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bf4c6cd2a6a5a7ad16ee05d49a690fbb66340a526e739bd256487f21673814e4' 
  AND token = 'dqCOo7L+Vek2ku3hGiWu39QsDYhuQPr5jerha6lS7PU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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