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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a76eab3d98ed215377670556b9c7a3fd4efb5ff66c858b6eb78fbb93d809201a' 
  AND token = 'Zw2KHXtG7W8Z/opwTwot7NxVIsAyv/q2EY1erH27pt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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