SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1abba885c96e1dd8d5f94227fdb69d45e7b2f59b6a744b5916253f39652128b9' 
  AND token = 'EBqHHLtVw9R+TMs/BFBjVS5/oBTPmkwQb/tBPiuuJJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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