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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2224446d3fd43720906abcb6d90027c16b1b79e40ce359351a29071ee21bd77d' 
  AND token = 'OjNogfeCl/GaThrH0tZt2bNUhkQhCllb3zAwsUuWX2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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