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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '932646ba23f30ab654cf6fe7d52740498af3d89f6e5f52a732b116315535b14e' 
  AND token = 'DRxQQeRnBoPauwbjlnJ52IESj345QaHpwvewN6PCXPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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