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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e85671edbb41eee021ac2fc73394b9b7b3cc4730dcd1ffd489aed095e49c64ac' 
  AND token = 'K/c3QJVw6wtdxvr/xXfWAfE5sv3ylfPUH2uhaiY76G0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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