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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '025042c85a1c153d4411f5d18eeed29480f8443770a68cb3ab04d4e711555dd2' 
  AND token = 'ibAyG+/uUlyz8aaladgHphJ9M5mR9XFjR0rRA+aglak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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