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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '86e3eb2ff028ee31623679f3785f648875d1ec6b134526149cc95422e4e60d35' 
  AND token = 'I8FP/ezMdYwMk70wyNyyhl77kaFmVXoYhsnJb3SXWAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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