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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '04cb2c14ba6d3bb9fdd3407c48ee58a1a52a3450cc96c5e5881bb62b2b05fe4c' 
  AND token = 'kuyW4GnamXvubxDj+qtIPYWDpDDLFDnO64PwO6rwpKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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