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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06dd5aef417e1d692f1fbe180db473be4f43748f0b0c48913f44a9f7ae114855' 
  AND token = 'S62CDl9/SHMrivxGhjpb7Va2+w85J7P2ho/wpRhck/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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