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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '008fe757d038f9f4a9ed877f5fa7cac254b20b5a807743873e54221d25da73d0' 
  AND token = 'UDRoHgyslv6b/C95yzdtVmGd3b5QKhtO0TJ4FLs61Js=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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