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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01b442ae7104c80e830676ab3c3357124b6bbc621c6ca856a7cc0b7c7a89bb23' 
  AND token = '3Mg1N4VmNvL8qXPbt0h9+7TC6KgHy+4D2gfataDLb/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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