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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24beca3b349709eae1279d0d70bab7027779a7a39437a34310f09e14bde015bc' 
  AND token = 'Of3d9z/OpjsQxEVUiz/Kg/1F2DU9psMpDMh1tnOKEVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}