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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e219d80760a1438440146806c1fe1371c7b4e7dd719f6aa9eba28cd0151e19c' 
  AND token = 'eXFdlf7qRJpp5Xps4DSyPZr04KsIJef16b4zuKvuHds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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